Apex Precision Voltage References

Apex Microtechnology offers an alternative to internal, on-chip voltage references

Apex Precision Voltage ReferencesPrecision voltage references offer performance features intended to diminish the impact of adverse operating conditions. Apex precision voltage references exhibit much lower voltage supply drift, lower temperature coefficients, and reduced thermal hysteresis. The result is a more attractive solution when compared with their internal, on-chip counterparts.

The basic design premise for using a voltage reference is to produce a precise value of output voltage. A typical application is a data conversion system where system accuracy is very much dependent on the accuracy of the supply voltage established by either an internal or external DC voltage reference. The voltage reference sets the full-scale input of the data conversion system.

Any lapse in the voltage reference's ability to maintain the accuracy of the supply output over operating temperature, and the linearity, as well as the dynamic range of the system, will be adversely affected. The performance of practically all voltage references, whether internal or external, will vary simply over time by nature or as a result of environmental factors such as humidity, pressure, and temperature.

VRE100 Series - 10 V Hermetic 14-pin Ceramic DIP

VRE100 series precision voltage references provide ultra-stable +10 V (VRE100), -10 V (VRE101), and ±10 V (VRE102) outputs with ±0.5 mV initial accuracy and a temperature coefficient as low as 0.5 ppm/°C over the full military temperature range. This improvement in accuracy is made possible by a unique, proprietary multi-point laser compensation technique.

Applications
  • Precision A/D and D/A converters
  • Transducer excitation
  • High precision test and measurement instruments
  • High resolution servo systems
  • Digital voltmeters
  • Accurate comparator threshold reference
VRE104 Series - 4.5 V Hermetic 14-pin Ceramic DIP

VRE104 series precision voltage references provide ultra-stable +4.5 V outputs with up to ±0.4 mV initial accuracy and temperature coefficient as low as 0.6 ppm/°C over the full military temperature range. These references are specifically designed to be used with the Crystal Semiconductor line of successive-approximation type analog-to-digital converters (ADCs). This line of ADCs sets new standards for temperature drift, which can only be as good as the external reference used. The VRE104 combined with a Crystal ADC will provide the lowest drift data conversion obtainable.

Applications
  • Precision A/D and D/A converters
  • Transducer excitation
  • High precision test and measurement instruments
  • High resolution servo systems
  • Digital voltmeters
  • Accurate comparator threshold reference
VRE305 Series - 5 V 8-pin DIP or SMT

The VRE305 is a low cost, high precision +5 V reference. Packaged in an industry standard 8-pin DIP or SMT, the device is ideal for upgrading systems that use lower performance references. The device provides ultra-stable +5 V output with ±0.5 mV (.01%) initial accuracy and a temperature coefficient of 0.6 ppm/°C. This improvement in accuracy is made possible by a unique, patented multi-point laser compensation technique. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regulation, and long-term stability, making the VRE305 series a highly accurate reference available in a standard 8-pin DIP or SMT.

Applications
  • Ideal for calibrating scale factor on high resolution A/D converters
    • Offers superior performance over monolithic references
  • Recommended for use as a reference for 14-, 16-, or 18-bit D/A converters that require an external precision reference
VRE3050 Series - 5 V 8-pin SMT

The VRE3050 is a low cost, high precision +5 V reference that operates from +10 V. The device features a buried Zener for low noise and excellent long term stability. Packaged in an 8-pin SMT, the device is ideal for high resolution data conversion systems. The device provides ultra-stable +5 V output with ±0.5 mV (.01%) initial accuracy and a temperature coefficient of 0.6 ppm/°C. This improvement in accuracy is made possible by a unique, patented multi-point laser compensation technique. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regulation, and long-term stability, making the VRE3050 series a highly accurate reference.

Applications
  • Ideal for calibrating scale factor on high resolution A/D converters
    • Offers superior performance over monolithic references
  • Recommended for use as a 14-, 16-, or 18-bit data converters that require an external precision reference

VRE100

ImageManufacturer Part NumberDescriptionPart StatusReference TypeAvailable Quantity
VRE102C datasheet linkIC VREF SERIES +-10V 14CDIPVRE102CIC VREF SERIES +-10V 14CDIPActiveSeries20 - Immediate
VRE102C product page link

VRE104

ImageManufacturer Part NumberDescriptionPart StatusReference TypeAvailable Quantity
VRE104C datasheet linkIC VREF SERIES 4.5V 14CDIPVRE104CIC VREF SERIES 4.5V 14CDIPActiveSeries0VRE104C product page link

VRE305

ImageManufacturer Part NumberDescriptionPart StatusReference TypeAvailable Quantity
VRE305AS datasheet linkIC VREF SERIES 5V 8SMTVRE305ASIC VREF SERIES 5V 8SMTActiveSeries5 - Immediate
VRE305AS product page link

VRE3050

ImageManufacturer Part NumberDescriptionPart StatusReference TypeAvailable Quantity
VRE3050BS datasheet linkIC VREF SERIES 5V 8SMTVRE3050BSIC VREF SERIES 5V 8SMTActiveSeries0VRE3050BS product page link
Published: 2012-11-09